p7zip is a port of 7-zip for *nix platforms.

7-zip is a file archiver with a high compression ratio.

7z	uses plugins to handle archives, excepting rar archives.
	unRar is available as a subpackage due to licensing.
7za	is a stand-alone executable, and handles less archive
	formats than 7z.
7zr	is a light stand-alone executable that supports only
	7z/LZMA/BCJ/BCJ2.
